<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="css/layui.css">
</head>
<body>
    <div class="layui-row layui-col-space10">
        <div class="layui-col-md4" style="background-color: #00f7de;height: 100px;">你的内容9/12</div>
        <div class="layui-col-md4 " style="background-color: #5fb813;height: 100px;">你的内容3/12</div>
        <div class="layui-col-md4" style="background-color: #5fa871;height: 100px;">你的内容3/12</div>
    </div>

</body>
</html>